Furnace



U. GUMMINGS. Furnaces.

N0.. 232,690. Patented sept. 28,122.80.

UNITED STATES PATENT @Prien URIAH GUMMINGS,.OF BUFFALO, NEW YORK.

FU RNAC E.

SPECIFICATION forming part of Letters Patent No. 232,690, dated Septemberr28, 1880.

Application filed October 1, 1879.

To all whom it 'may concern: A

Be it known that I,\URIAH GUMMINGS, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Furnaces, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to a furnace which may be employed in connection with steam fuel, gaseous `and solid, which are mixed with the flame, are prevented from heilig oxidized by the cooling which results from their contact with the cool surface of the boiler, and form smoke.

The object of my invention is to effect a' complete combustion of the various component parts of the fuel 'by preventing them from coming in contact with the surfaces to'be heated until after the combustion is completed; and it consists of a furnace in which the combustion-chamberis separated from the surfaces which are to be heated by an arch or cover of fire-brick or analogous material arranged over the grate so as to form the top of the combustion-chamber, and a series of very tical pillars arranged in the passage or outlet through which the gases escape from the combustion-chamber, as will be hereinafter more fully set forth.

In the accompanyingdrawings, Figure 1 is, a sectional elevation of my improved furnace applied to a steam-boiler. Fig. 2 is a horizontal section in line a' fr, Fig. 1. Fig. 3 is a cross-section in line y y of Fig. 2. Fig. lI is a horizontal section in line z z, Fig. l; y

Like letters of reference designate like parts in the several gures. y

A represents the grate, B the combustiom chamber above the same, and C the ash-pit below the same.

arranged in three transverse rows, the pillars in` one row being opposite the gas-passages between the pillars in the next adjacent row. The burning fuel upon the grate A imparts a high degree of heat to the arch lD and the pillars E, and the flame is thereby prevented from coming in contact with the comparatively cool surface of the boiler or other apparatus to be heated.

In escaping from the combustion-chamber B toward the chimney, the gases have to pass through the narrow spaces between the highlyheated pillars Ewhereby the gases are heated to sucha degree that a complete oxidation of all the combustible material is effected before the gases are permitted to come in contact with the boiler. y

The highly-heated arch D and pillars E radiate a large portion of their heat upward,`

where it is absorbed by the boiler or other apparatus in connection with which the furnace is employed.

H represents one or more air-tubes arranged longitudinally in the arch D for admitting air to the interior of the furnace. The outer ends of the tubes H communicate with the external air, and are provided with suitable registers, whereby the admission of air to the tubes H can be regulated, and the innerends of the tubes H open between the pillars E. The air which is drawn into these tubes by the chimney-draft becomes heated in passing through the heated tubes, and is discharged into the air-passages between the pillars E., where it commingles with the highly-heated gases, and

IOO

I claim as my invention- A furnace constructed with an-arch or cover, D, forming the top of the combustion-chamber, and vertical pillars E, arranged in several transverse rows in the passage through which the gases escape from the combustion-chamber between the latter and the object to be heated, the pillars in one row being opposite the gas-passages between the pillars in the next adjacent row, the arch being so extended 1o that the llame is compelled to conie in contact With the highly-heated arch and pillars before it comes in contact with the surfacev to be heated, substantially as set forth.

U. GUMMINGS. Witnesses:

JN0. J. BONNER, EDW. J. BRADY. 

